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Sat, 16 Oct 2021 08:52:11 -0400 |
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> The statement above means that I may have completely misunderstood high
> school physics. As I recall it, for any mixture of gases (including water
> vapor), there are the same number of molecules per unit volume (I'm
> skipping the actual number, since that is irrelevant to this discussion).
> So can water molecules actually fit between existing nitrogen and oxygen
> molecules in a fixed volume, at the same temp and pressure, without
> displacing some nitrogen and oxygen molecules?
I think you hit the basic problem with the discussion, which is fixed
volume. If you add water vapor to a closed container, the pressure and/or
temperature will go up. A hive is not a closed container so the air with
the increased water vapor will be less dense per unit volume even though
the air pressure will be the same since it is not constrained to the hive
but is the measure of the entire atmosphere.
Avogadro's number- "Amadeo Avogadro first proposed that the volume of a
gas at a given pressure and temperature is proportional to the number of
atoms or molecules, regardless of the type of gas." .There is that pesky
fixed volume, pressure and temperature. And it does not matter if it is
oxygen or water vapor. High school physics (and Chemistry) still rule.
Bill Truesdell
Bath, Maine
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